I dont know but I believe that they use different imbedance speakers. PRO
version needs so probaly
external phones amplifier... again I dont know - just a wild guess..
I my self use Beyerdynamic DT250-80, there is also different model which
basicly wont work with portable
devices but this model does.
..jukka
"CC" <CC@Hotmail.com> wrote in message
news:1099223006.5508.2@lotis.uk.clara.net...
> X-No-Archive: Yes
>
> Does anyone know what the differences are between the Beyerdynamic DT990
and
> the DT990 Pro headphones?
>
> TIA.
>
>
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